<template>
  <el-container class="home-container">
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type='info' @click="btnOut">退出</el-button>
    </el-header>
    <!-- 侧边栏菜单区域 -->
    <el-container>
      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click='toggleCollapse'>|||</div>
        <el-menu background-color="#333744" text-color="#fff"
          active-text-color="#409EFF" unique-opened :collapse='isCollapse'
          :collapse-transition='false' router :default-active='activePath'>
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for='item in menulist' :key='
          item.id'>
            <!-- 一级菜单模板 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path"
              v-for='subItem in item.children' :key='subItem.id'>
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>
                  {{subItem.authName}}
                </span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menulist: [],
      // 一级菜单图标
      iconObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: this.$route.path
    }
  },
  // 生命周期函数 界面一加载 就会执行这个函数
  created () {
    this.getMenuList()
  },
  beforeUpdate () {
    this.activePath = this.$route.path
  },

  methods: {
    btnOut () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取菜单数据
    async getMenuList () {
      const res = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error('获取菜单数据失败')
      this.menulist = res.data
    },
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    }

  }
}
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  display: flex;
  background-color: #373d41;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border: 0;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 15px;
}
.toggle-button {
  text-align: center;
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  letter-spacing: 0.5em;
  cursor: pointer;
}
</style>
